Albert hambs



ALBERT nAMnsnoF SPRINGTinLD,` MASsAoriUsnTTs;

MACHINE non rAcINGr AND PoLIsHiNG SToNE AND OTHER SUBSTANCES.`

i i Specicationof Letters Patent No. 8,150, dated June 10,` l18511.`

`To all whom #may concern: i a

Be it known that I, ALBERT EAMES, of Springfield, in the county ofHampden `and State of Massachusetts, have invented certain new anduseful Improvements in Machinery for Facing or Polishing Stones andother Substances, and that the following is a full, clear, and exactdescription of the same, reference being hadl to the accompanyingdrawings, making part of this specification, in which- Figure 1 is anelevation of the machine with certain parts in section and Fig. 2 a

plan 4of the chuck with its universal joint.

The same letters indicate like parts in all the figures. a

The object of my inventionis to face, rub down or polish the Surface ofstones and other `substances after they have been dressed, and the`nature of my invention consists in eecting this purpose by means of, arubber, grinder or polisher attached to a chuck and connected andcombined by means of universal joints with a spindle driving motion fromsome first mover to rotate the said grinder,rubber or polisher which ismade self adapting to the surface to be worked by the sliding of thespindle in its bearings, or the equivalent thereof, the grinder, rubberor polisher being moved -over the surface to be faced or polished bymeans of a hand lever connected withthe connecting rod of the universaljoints and with the frame by ball and socket joints that it may be freeto move in all directions.

In the accompanying drawings a represents the stone to befaced, rubbedor pol- 'ished, `the said stone being placed on any appropriate platformor base of the frame b.

A block of stone 0 such as is used for rubbing down, facing or polishingstone is secured to the under face of a metal chuck Z by securing screwsc. `The said chuck is connected with thelower end of a connect ing rod fby means of a universal joint g of the usual construction, and the upperend of the said rod is in turn connected by means of another universaljoint la with the 'lower end of a spindle which is adapted to.

slide vertically in appropriate boxes in a frame j; the said spindlebeing' provided with a pulley 7c to receive a band from some firstmover.

The connecting rod f is provided with a ball Z embraced by a'socket m,on a hand lever n the rear end of which is free to slide in a hole inanother ball 0 fitted to a socket inaframe p.

i rotary motion to the grinder, rubber or polisher c to grind, rub orpolish the surface of the stone and that the attendant by means `of ahand lever can cause it to traverse over the entire surface of thestone, while the connections of the chuck with the spindle and thesliding of the spindle in its boxes render it self adapting to thesurface to be worked. By this means a small grinder can be carried overevery part successively of a very large surface, bearing with equalforce on every point, and as the grinding, rubbing or polishing iseffected by its rotary motion, theattendant can continue the operationon every part of the surface as long as may be desired, this being`often important by reason of the varying texture of the material.

It will be obvious that any kind of substance which will answer thepurpose of grinding, facing or polishing can be employed, and that emeryand `other pulverized substances can be employed to assist the grinderor polisher. j

Although I have represented one kind of universal joints to form theconnections between the chuck and spindle and between the connecting rodand hand lever, I do not j mean to limit myself to this specialconstruction as other kinds of universal joints may be substitutedtherefor-nor do I wish to limit myself to the mode of rendering'thegrinder or polisher self adapting to the surface operated on, by thesliding of the spindle, as the same thing can be effected by knownmechanical equivalents, such as a sliding feathered joint in theconnecting rod. But I have described and represented the mode ofconstruction whichll have essayed'with success and deem the best.

What I claim as my invention and deas described, that the said grinder,rubber 10 sire to secure by Letters Patent, is-' or polisher may becarried over any and all The method substantially as herein departs ofthe surface to be Worked While its scrifbed orf grinding, facing orpolishing the surface is self adapting, as described. sur ace o stonesand other substances, by means of a grinder, 'rubber or polisher, con-ALBERT EAMES nected and combined With a spindle from Witnesses: Which itderives a rotary motion by means PHrLos B. TYLER, of universal andsliding joints, substantially S. R. B. LEWIS.

